I sometimes think there is a malign force loose in the universe that is the social equivalent of cancer, and its plastic. It infiltrates everything. Its metastasis. It gets into every single pore of productive life. I mean there wont be anything that isnt made of plastic before long. Theyll be paving the roads with plastic before theyre done. Out bodies, our skeletons, will be replaced with plastic.

In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- Carl Sagan